Formation of a Novel Cyclopenta[b]pyran Derivative in the Dehydrobromination of 1,10-Dibromobicyclo[8.1.0]undecane-3,8-dione

Abstract

Treatment of 1,10-dibromobicyclo[8.1.0]undecane-3,8-dione (3) with triethylamine in dichloromethane results in the formation of a deep red compound formulated as 1,4,5,6,7,10,11,12,13,15b-decahydroazuleno- [1′,2′-e]cyclopropa[3,4]cyclodeca[1,2-b]pyran-3,14-dione (13) on the basis of its spectral properties.